Input and output amplifying unit



E. G. HOCH ET AL INPUT AND OUTPUT AMPLIFYING UNIT Filed Nov. 16, 1,925

Eff-M3 Fel-a. 25,

Edmund Er. Huch Jael l... LduHiT'l Feb. 25, 1930. E, G, HQCH ET AL1,748,225

INPUT AND OUTPUT AMPLIFYING UNIT Filed Nov. 16, 1925 5 Sheets-Sheet 2Edward G.Hmch

dual L.. Mullin atto: um:

Feb. 2.5, 1930. E Q HOCH ET AL, 1,748,225

INPUT AND OUTPUT AMPLIFYING UNIT Filed Nov. 16, 1925 5 Sheets-Sheet 3annum,

Patented Feb. 25K, 1930 PATENT OFFICE EDWARD G. HOCH, OF MINNEAPOLIS,

AND JOEL L. WALLIN, or sT. PAUL,

MINNESOTA INPUT AND OUTPUT AMPLIFYING UNIT Application filed November16, 1925.

Our invention relates to input and output amplifying means, such as areception by a microphone or other means including the input, While theoutput may be in the form of a loud speaker, transmitting means in theform of a phonograph horn, or transmitting means of any other suitablenatureused to output sound.

A feature of our invention resides in an 1o amplifying unit used inconnection With radio broadcasting, radio transmitting, such as loudspeakers and the like, or any other suitable means Where it is desiredto input and output sound associated with amplification of any suitablenature. Our invention includes means for changing the direction of soundfrom a fixed position Nto an oscillating means whereby the sound wavesare put in motion and continued in motion in a manner to unify the soundin the atmosphere, rather than directing it out of a loud speaker orphonograph horn in a single direction as has been done heretofore.

Our invention provides means for receiving or transmitting sound Wavesin a manner so as to overcome the harsh and undesirable acousticalsounds which are present in ordinary fixed rigid input and output meansin radio and phonographic instruments, by providing an oscillating orswinging amplifying unit for output or for input receiving units whichhas the property of improving the rhythm, overcoming resonatingreactions and diffusing the tones which practically eliminates theharshness in the present well known construction of mechanical soundreproducing means. With our invention sound is received and reproducedin a manner so as to so nearly equal the direct reproduction of the samefrom the source of the sound, as to practically deceive the ordinaryobserver who, in so far as Weknow, would practically feel assured thatthe sound was being reproduced from its origin,`not by a mechanicalmeans but by the very sound making instruments or the person singing orspeaking.

Heretofore, in so far as We know, reproducers and receivers have had atiresome and mechanical effect, the acoustical reproduc- J` ers beingharsh, mechanical and fixed from a Serial No. 69,277.

point so as to be even annoying if one stands directly in front of areproducing and amplifying loud speaker or phonograph horn, While in ourinvention this is practically en` tirely overcome and the amplificationis increased, together with sound reflections Which may be obtained inthe carrying out of our invention in a manner so as to set upsympathetic vibrations and reactions, and reA store the beauty, colorand quality of tone that would be otherwise lost in mechanicalreproducing and receiving units.

A feature of our invention resides in means adapted to oscillate orswing the amplifying unit in timed relation in accordance With the musicor reproducing of the sound, so that the oscillation of the unit causesthe sound to be directed out into the atmosphere in a manner so that itwould be very difficult to ascertain Whether or not it Was comingdirectly from the source of the sound reproduction.

Our invention includes oscillating the amplifying unit Within a cabinetof any suitable nature which has the property of resonation of sound,thereby' securing additional advantages of sound reflection whichpermits the vibrations to be directed out at continually differing andchanging position in a manner so as to overcome horn or loud speakervibrations and reactions, and permitting the sound to be brought outeven, true and Without setting up a counter series of vibrations in thereproducing instrument which is true of a. fixed reproducer, loudspeaker, phonograph reproducer and horn, or other instruments used tobroadcast sound into the atmosphere from a mechanical sound reproducingmeans. In our amplifying unit the constant changing position of the unitdoes not permit the building up of a series of tone vibrations in anyone direction, but rather diffuses the same so as to prevent any fiat,harsh or undesirable unharmonious Vibrations or sounds to be linked withthe reproduction receiving and output of our amplifying unit. We havefound that our amplifying unit for input and output of sound has theproperty of so clearly receiving and reproducing the sound as to he mostdesirable either for phonographic use or for radio reception andtransmitting,

and to be, in so far as we know, far superior to anything forreproducing sound as is employed in phonographs, loud speakers or otherradio equipment.

While we have set forth some features and objects of our invention, wedesire to more clearly and fully bring these, together with otherfeatures of our invention, forth, in the following specication andclaims.

In the drawings forming part of the specification:

Figure 1 is a diagrammatic front view of a radio loud speaker carryingout our invention.

Fi ure 2 is a'diagrammatic plan view partly il ustrated in crosssection, of the loud 'speaker illustrated in Figure 1.

Figure 3 is a front view of a phonograph constructed to carry out ourinvention.

Figure 4 is a perspective view diagrammatically illustrating ourinvention applied to a phonograph, a portion of which is broken away andillustrating an electric motor adapted to operate the same.

Figure 5 is a section on the line 5--5 of Fi ure 4.

igure 6 is a diagrammatic side elevation ofa microphone operated by ourmeans of input in our invention.

Figure 7 is a section on the line 7-7 of Fi ure 6.

igure 8 is a detail of a portion of our invention.

Figure 9 illustrates another form of microphone equipped with ourinvention and adapted to be operated in a manner to carry out our meansof receiving, or input of sound.

In the drawings the loud speaker A is provided with the amplifying horn10 which is mounted Within the cabinet B in a manner so'as to becontained' within an inner compartment 12 which is spaced away from theouter Walls of the casing of the cabinet B so 'as to form a resonatingcompartment in which the loudspeaker amplifying horn 10 is positioned.

The loud speaker amplifying horn 10 is pivotally connected by means ofthe adjustable screw member 13 .which pivotally engages on one side ofthe horn 10 and which is' pivotally supported by the standard 14 on theunder side of the horn 10. An operatin shaft 15 extends through thestandard 14 and is connected by the link 16 to the operating arm 17.Thearm 17 is pivotally connected to the disk 18 of the motor 19 which ispositioned beneath the compartment 12 and is separated therefrom by thewall 20.

The motor 19 is of any suitable construction of a well known mechanicaltype adapted to be wound by the crank 21 and being provided with asuitable spring motor such as is used in phonographs or the like, andnot illustrated in detail in the drawings.

When the motor 19 is operated it is adapted to operate the lever arm 17which operates the connecting link 16, which in turn operates the vshaft15 to move or oscillate the horn 10 as ing means, such as the rheostat23 in Figure 5,

so that the speed of the motor can be varied in its operation, and thispermits the oscillation of the loud speaker horn 10 in accordance withthe music which is being broadcasted and amplified through the horn 10.

The pivotal connection through the adjustable screw member 13 and thestandard 14 of the horn 10 permits the free oscillation and movement ofthe horn 10 in al manner so that instead of the music or sound beingamplified out of the horn 10 in a harsh, ri id manner, the vibrationsset up in the horn y the resonating of the sound waves coming from thetransmitter 22 of the loud speaker horn 10 are absorbed and diffused bythe motion and free mounting oft-he horn 10, and instead of the music orsound being amplified out of the horn in a manner which would de- 'tractfrom the rhythm and harmony of the original sound received by thereproducer 22, we have found that our reciprocating amplifying horn 10broadcasts the sound practically as it is received in the same harmonicmanner without distortion and distributing the same into the atmospherein a manner so as to overcome the heretofore mechanical sound anddistortion which is ordinarily produced in the ordinary loud speakers.The sound coming from our oscillating amplifying horn 10 seems to justfloat in the air with its original melod and harmony.

In `igure 3 we have illustrated a phonograph C having a loud speaker oramplifying horn 25 which is adapted to be operated in a manner tooscillate the same which we accomplish by the pivoted supportingstandard 26 positioned in the back/portion of the horn compartment D, sothat the horn can be oscillated back and forth in the same manner as thehorn 10 is oscillated within the compartment 12. A

In the phonograph C the standard 26 is to form a tubular sound receivingmember so as to connect the amplifying horn 25 with the tone arm 27 fromthe reproducer 28. The reproducer engages with the record 29 of thephonograph C, as illustrated in Figure 4, and is adapted to operate inthe ordinary well known manner.

The phonograph C is equipped with the ordinary spring motor 30 which isoperated by the crank 31 excepting that We provide a disk 32 on theinner side of the motor 35 Which is connected by the arm 33 with thelink 34 and the link 34 is connected to the pivoted standard 26 in amanner so as to oscillate the 'horn 25 when the motor 30 is inoperation. In this manner the same motor, such as 30, which operates tooperate the record in the phonograph C simultaneously operates andoscillates the horn 25 back and forth within the horn compartment D ofthe phonograph C. In Figures 4 and 5 we have illustrated an electricmotor 35 which may be of any ordinary well knownconstruction and is onlyillustrated diagrannnatically in the drawings, connected by the electriccord 36 to any suitable source of electrical energy. The motors 30 and35 are only iilustrated diagrammatically and both of these motorsoperate to simultaneously operate the record 29 of the phonograph C andthe oscillation of the horn 25.

Our phonograph operated in the manner described, reproduces sound in amost remarkable manner, clear and distinct Without perceptible hornvibrations which tend to distort the harmony of the music or sound fromthe record, and practically simulating the sound as it is originated. The rhythm produced by our phonograph C is remarkable in its harmonyv andapparently is entirely free of the objectionable resonating sounds thatare ordinarily present in mechanical reproducers.

The input of sound such as in the microphone for radio broadcasting isillustrated as attached to our invention by the microphone E which ismounted upon the motor cabinet F and is adapted to be operated by themotor F through the connecting arm 3S operated from the disk 39 andadapted topoperate the arm 40, which is mounted on the dependingstandard 41 of the microphone E. The standard 41 is pivotally supportedon the shaft 42 so that When the motor F is operating, the microphone Eis oscillated back and forth in a manner so as to input the sound in asimilar manner as the sound is output by the loud speaker A and thephonograph C. Such inputting of the sound with the microphone Eoscillating, diffuses the reception and increases the efficiency of thereceiving qualities of the microphone E. The motor F is of an ordinaryspring type such as is used in phonographs and is not illustrated indetail in the drawings.

The motor F is adapted to be supported on a suitable standard 43 fromthe base 44.

In Figure 9 We have illustrated the microphone E connected to areceiving horn 45 which is pivotally mounted at 46 and 47. Theconnection 46 providing an adjustable pivotal connection With the horn45 and the connection 47 forming a supporting standard and shaftdepending from the lower portion of the horn 45 and adapted to beconnected with the operating disk 48 of the motor F. The operating disk48 is connected by the arm 49 with the link 50 which operates the shaft47 in a manner to move and oscillate the horn 45 within the cabinet 52.This forni of input for radio reception and broadcasting provides a verydesirable means for collecting the sound in the atmosphereandtransmitting it in a clear, undistorted manner for radiobroadcasting. This is an important feature of our invention as itpermits the microphone E to operate much more efficiently and making itpossible for the microphone to collect the sound in the atmosphere withmore uniform reception and without harsh undesirable sounds coming frompoints directly in front of the microphone. In other words the receptionor input through our microphone E, while the same is being oscillated,entirely overcomes fading of the sound of speakers talking before themicrophone IC or of some of the musical instruments playing before thesame.

In Figure 8 the microphone standard is operated by the slidingconnection 54 which is connected with the operating disk 55 and isadapted to move or oscillate the supporting standard 41 in a manner soas to oscillate the microphone F which is broken away in this view.

The heretofore mechanical harshness and lndesirable distortions Whichhave been secured in sound reproductions and input devices are entirelyabsent from our amplifyin;T unit for output and our receiving unit forinput. Music coming from our loud speaker A reproduces the melody in sofar as We are able to determine. practically as it is received with itsoriginal harmony and tone, giving sweet, clear rhythm and floating thesame out into the atmosphere in a manner so that Cthe listener can standin most any portion of the room wherein the music or sound is beingamplied and not find the sound waves harsh or of a mechanical distortednature, not being louder in one part than in another but unified so asto be practically equally distributed into the atmosphere.

In our output invention it is desirable to provide units where theinput, V'such as a microphone or other sound receiving and recordinginstrument is used, is oscilla? ed during the inputting operation andthe outp'ft unit is adapted to be oscillated, Which may consist of a4loud speaker reproducing unit of a radio or an amplifying horn andrcproduccr of a phonograph. By using our means and method of inputtingand outputting sound. we believe that We overcome undes-:irabledistortions and discords together with other undesirable mechanicaldistortions or harshness of the receiving and reproducing instruments orunits so that by using our method and means of inputting and outputtingsound we accomplish a very desirable means of providing a natural, or asnear as possible` reproduction of the natural sound, either of amechanical instrument or instruments such as orchestra and band music orindividuals singing or speaking, so that our use of our invention hasdeveloped, in so far as we know, a new and most satisfactory means ofinputting and outputting sound.

In accordance with the patent statutes we have described the principlesor operation of our amplifying unit for output and receiving for inputof sound and while we have illustratcd a particular formation of deviceand means for carrying out our invention, we desire to have itunderstood that these illustrations are only suggestive and that theinvention can be carried out by other means and applied to uses otherthan those above set forth within the scope of the following claims:

lVe claim:

1. A radio loud speaker including, an amplifying member, a transmitter,associated with said amplifying member and means for oscillating saidamplifying member to continually change the direction of sound comingfrom said amplifying member during the operation of said loud speaker.

2. A radio loud speaker including, means for oscillating the same tochange the direction of sound ampliied by said loud speaker.

3. A radio loud speaker including, an amplifying member, a resonatingcompartment for receiving said amplifying member, and means foroscillating said amplifying member within said compartment to overcomelmechanical distortion and vibrations within and about said amplifyingmember.

4. An input and output unit for radio and phonographic use, including,means for oscillating the input and output units when in operation.

5. A radio loud speaker including, an amplifying unit, means foradjustably holding said unit pivoted to be oscillated, and means foroscillating said unit.

6. A radio loud speaker including, an amplifying unit having atransmitter, means for pivotally holding said unit and adjustable meansfor oscillating said unit whereby said unit can be oscillated tosynchronate with the sound being reproduced by said unit.

. 7 A phonograph including a resonating compartment, an amplifying unithaving a horn pivotally mounted within said resonating compartment andmeans for moving said horn back and forth within said compartment inaccordance with and to synchronize with the record being reproduced sothat the horn may be operated to oscillate slow or fast within saidcompartment.

8. A phonograph including, an amplifying unit and reproducer, a tone armand means come acoustical distortions.

EDWARD G. HOCH. JOEL L. WALLIN.

so l

